Method of forming tanks



pii 22, 1936. w. J. wAcHowlrz METHOD OF FORMING TANKS Filed March 10,1927 2 Sheets-Sheet 2 Wak j Wachmwrtz...

Patented Apr, 22, ldd@ y L erre i anni,

WALTEE, d'. WGHWITZ, @Il MLWAUKEIE, WISCONSIN', .diSGNR ZIP@ THE WA@MANUFACTURING GMANYZ, 03E'` MILWAUKEE, WISCQNSEN, A @@.REOMTIQBT @ElWESCQNEN staunen or nonnina tranne .Application tiled March it, tra?.serial 1ra, Haalt,

ylhis invention relates to certain new and useful improvements intanks/and method of forming the same, and refers more particularly totanks especially designed tor conveying or storing milk and-otherliquids.

For sanitation purposes, it is impractical to transport or store milk orthe like in con@ tainers ot steel, iron or the like, and, here tofore ithas been customary to line the conE tainers with glass which is veryobjectionable as due to the tortional stresses to which the tarda issubjected when mounted on a truck chassis, the'glass chips, exposing themetal wall to the milk and also makingit necessary to carefully strainthe milk to remove the chipped portions of the glass lining.,

lt is, therefore, an object of this inventionv to provide an improvedtank construction, the interior of which is lined with a' metal havingthe ability to resist the lactic of the milk and which will not chip orHake od irrespective of the tortional stresses to which the tank may besubjected.

Another yobject of this invention resides in the provision of animproved tank for trans orting milk and the like having a removable headat one end thereof carrying a draining valve whereby the .wall of thetank proper is unbroken except at a oint providing a man-l hole throughwhich tde tank is filled and access had to the interior thereof forcleaning- A furtherv object of this invention resides in the provisionof an improved tank ofthe character described consisting ot a shell orsteel or other metal and an inner ,lining oil non-corrosive metal.

And a still further object of this invention resides in the provision ofan improved tank and method or constructing the same whereby an outershell' of steel or the like is provided and an inner layer or lining ofnon-corrosive metal such as tin or nickel sweated or otherwise securedto the inner surface of the tank whereby an unbroken inner lining ofnon-corrosive metal is provided for the shell..

With the above and other objects in view which will appear as thedescription proceeds., my invention resides in the novelconstruction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly dened by the ap ended claim, it beingunderstood that such changes in the precise embodiment of thehereindis-I closed invention may be made as come within the scope of theclaimu ln the accompanying drawings ll have illustrated one com leteexample oli the physical embodiment o? my invention constructedaccording to the best mode ll have so lar devised for the practicalapplication of the principles thereof, and in which: Figure l is a sideelevational view or a tank embodying my invention, parts thereof beingbroken away and in section;

Figure 2 is a rear end elevational view thereof;

Figure 3 is a fragmentary sectional view of a portion of the tank wallillustratin the l manner ot tinningA the same prior to lining with anon-corrosive metal;

Figure l is a fragmentary perspective view ot the portion of the innerlining prior to its application to the tank inner wall;

t Figure 5A is a transverse sectional view taken through the tank andillustrating the inethod of sweating the lining in place, and

l Fi spectgiiie sectional view taken Athrough one wall of the finishedtank. f

Referring now more'particularly to the accompanying drawings, in whichlike numerals designate like parts throughout the sev eral views, thenumeral 5 designates a chassis or body frame of an automotive truck tothe side sills ot which ll-beams 6 are secured by U-bolts or the like 7,transverse beams or cradles 8 bridging the beams 6 and having theirintermediate portions shaped, as at 9, to conformv with the bottom otthe tank or container l0 supported thereon.

'llhe tank 5 is preferably of elliptical shape in transverse sectionwith its widest point horizontal and the outer or rear end thereof isclosed by a removable head 1l. 'llhe head 1l consists of a concave platehaving a dange l2 Welded or otherwise secured to its marginalportionvand bolted or otherwise secured, as at 13, to the lateral Harigeportion 15 of a ring or collar member 15 welded or otherwise re 6 is anenlarged fragmentary persecured to the tank proper at its rear mar- 1ginal edge portion. '1he head 11 being removable facilitates lining ofthe tank, as later described, and also permits ready access totheinterior of the tank for the purpose of lcleaning or repair. A suitabledraining or nel 20 in its under surface to receive the up standing beador rib 21 of the collar, and a threaded shaft 22 is rotatably secured tothe cover, as .at 23, and threaded in a' cover supporting arm 0r bracket24 with an operating wheel 25 on its outer end. One end of the bracket24 is swiveled to the collar 18, as at 25, and its other end is providedwith a downwardly and then inwardly extended part 26 receiving theperipheral flange portion 27 of collar 18 when the cover is in placeover the manhole so that the turning of the wheel 25, to thread theshaft 22 through the bracket arm 25, firmly secures the cover in placeas illustrated in Figure 1.

When the cover is elo-sed, the free end portion 26 of the arm 24 engagesa stop 28 on the collar to permit the movement of the arm and cover toopening position in but one direction and limit its movementtowardclosing position to prevent its over shooting the mark. With thisconstruction, an operator turning the wheel .25 to disengage the covernormally exerts a pressure on the arm 24 in a direction to swing it to aposition free of the manhole and likewise the operator grasping thewheel 25 to close the cover swings the bracket arm 24 and the cover overthe manhole until the free end of the arm 24 engages the stop 28. rlhecover is then in position so that continuous iturningM of the wheel 25secures the same 1n ace.

s the tank 10 is best constructed of sheet steel, which is impracticalfor use in connection with the transporting of liquids such as milk dueto its corrosive nature, it is essential that the same be lined with anon-corrosive material. A glass lining has been used heretofore, but.actual experience has `proven this type of lining to be impractical.This invention contemplates the lining of the tank with a non-corrosivemetal lining 29 fused or otherwise secured to the tank inner surface toprevent the liquid being conveyed from working between the lining andthe tank, and contacting with the metal base of the tank shell.

In Figures 3 to 5, is illustrated the irnproved method employed to linethe tank, which consists in thoroughly tinning the inner surface of thetank with solder or other suitable iiux 30, one manner of tinning beingto apply heat thereto from a blow torch and spreading the iiuX by abrush or other means 31. The outer surface of the lining 29 is likewisetinned and clamped against the tank wall by a bridge head 32 conformingwith the interior contour of the tank and having a screw shaft 33working in a jack member 34 consisting of two feet 35 engaging theopposite wall of the tank so that an end wheel 36 may bc actuated toforce the bridge head 32 outwardly and rigidly secure the lining inengagement with the tank wall at all points. While the lining is thusheld in place, heat is applied by a torch or other means 37 causing thetinned surfaces of the tank and lining 29 to fuse, as at 38, thussecuring thev lining section in place. In y ractice, it has been founddesirable to provi e two bridging heads 32, one fitting the narrowportion of the tank oval and the other 39 conforming with the largerportion of the oval, the same jack structure being utilized with eachhead.

1t will thus be seen that a lining 29 of any thickness may be readilyapplied to the tank 10 which is constructed of two metals fused togetherwhereby a very strong structure is provided which will withstand all ofthe tortionalastresses to which it is subjected.

What 1 claim as my invention is:

The hcreindescribed method of lining a tank of one metal with a liningof another metal which consists in tinning the inner surface of thetank, in tinning the outer surface signature WALTER J. WACHOl/VllTZ.

